In my template, I'm provisioning an ASG that uses an EC2 Launch template
In the UserData section, I do a cfn-init to provision the instance, which works fine.
However when I do the cfn-signal command, the command is successful (exit code of 0), but the Cloudformation stack never receives it, and the stack creation/update fails with Failed to receive 1 resource signal(s) for the current batch. Each resource signal timeout is counted as a FAILURE.
When I check Cloudtrail, I see that the SignalResource API call was completed, signaling the correct Stack and resource with a SUCCESS, (but a responseElements of null)
Excerpt from my Cloudformation template:
Resources:
MyLaunchTemplate:
Type: AWS::EC2::LaunchTemplate
Metadata:
'AWS::CloudFormation::Init':
configSets:
# lots-o-stuff to be done by cfn-init
Properties:
LaunchTemplateData:
# Remove other attributes for brevity
UserData:
Fn::Base64:
!Sub |
#!/bin/bash -x
yum update -y
# gather ENI
/opt/aws/bin/cfn-init -c install \
--stack ${AWS::StackName} \
--resource MyLaunchTemplate \
--region ${AWS::Region}
/opt/aws/bin/cfn-signal -e $? \
--stack ${AWS::StackName} \
--resource MyAsg \
--region ${AWS::Region}
echo $?
LaunchTemplateName: my-launch-template
MyAsg:
Type: AWS::AutoScaling::AutoScalingGroup
CreationPolicy:
AutoScalingCreationPolicy:
MinSuccessfulInstancesPercent: 100
ResourceSignal:
Count: 1
Timeout: PT10M
UpdatePolicy:
AutoScalingReplacingUpdate:
WillReplace: true
Properties:
# Remove other attributes for brevity
LaunchTemplate:
LaunchTemplateId: !Ref MyLaunchTemplate
Version: !GetAtt MyLaunchTemplate.LatestVersionNumber
Any idea what I'm missing here?
